VN1500 engine noise - Page 2

**cnc** · 12-23-2016, 12:27 PM

Quote:

Originally Posted by mick56

1999,no pog,Yes i had the top off the rear cylinder to put the camchain back on the cog.I never touched lifters,just took the cam out,put the chain back on,and closed it all up. Surely if there was a problem,ie an airlock,the oil light would be on.

No, the oil light would not come on for a lifter that was not getting oil. The oil light is based on the over all oil pressure of the system and generally only comes on for a couple of reasons, failure of the oil pump, really low oil level, severely worn engine components ( you would probably be seeing lots of blue smoke long before this ), or a faulty oil pressure switch.

A lifter pumps up with oil cushioning the valve train noise and takes up small amounts of tolerances in the train due to changes in engine temperature.
This will give you a rough idea Mick.

redjay · 12-23-2016, 12:31 PM

Relay, Rejay ? Too many cookie crumbs in the keyboard :)

Lafer · 12-23-2016, 01:04 PM

Thank guys for replies, the bike is 2000 VN1500 FI. There are no other problems with it except of this noise.
The work I done on it: removed engine, replaced all top gaskets dawn to cylinder head, replaced rocker cover because there was side crack in it. Replaced spring on KACR unit because it started to digging hole in rocker case (maybe it was be better to just get rid of KACR). Bleed air from hla, inspected camshaft and there was no obvious signs of wear... I know I should inspected piston while top end was removed, my bad didn't do it. Today tryed to block starter solenoids cause read somewhere that they could make noise similar with piston slap, so no changes happened but now it starts harder and the noise is still there. Exhaust is pretty tight, so probably it's not what causing my problems. Don't want remove engine again but if I dont find an easyer solution I'am gonna do it...
Here the guy posted video with piston slap and I bet it's sounds like mine problem

DragonLady58 · 12-23-2016, 01:18 PM

Pizton slap, rod bearing, wrist pin....

mick56 · 12-23-2016, 01:19 PM

I reckon if your piston is slack enough to make that much noise,a compression test would pick it up easily enough.

mick56 · 12-23-2016, 01:21 PM

CNC.Thanks for the video mate.

**cnc** · 12-23-2016, 01:39 PM

Quote:

Originally Posted by redjay

Relay, Rejay ? Too many cookie crumbs in the keyboard :)

Naw, my smart phone keeps trying to make it's self look smart by auto correcting and making me look like a dumb ass!

**Rasta** · 12-24-2016, 11:55 AM

I had this issue if some of you remember when my bike would not start. When it finally started I had told you there was a big bang. Well eventually it started this ticking that is in this video. If I let the bike seat idling the lifters would pump up and it would quiet down. After riding it hard for a while the noise would return. My final conclusion was that I a slash adjuster/ lifter that would bleed down. I planned to pull the motor and replace all the adjusters since it would be hard see which one it was. They are about $75 each, multiply that by 8. After talking to MAS TEQUILA I found a motor with about 20,000miles for a little over $1000. Since the original motor had 75,000miles on it, I got the other motor and put it in instead.

**Rasta** · 12-24-2016, 12:01 PM

Quote:

Originally Posted by mick56

I reckon if your piston is slack enough to make that much noise,a compression test would pick it up easily enough.

I tried that on mine trying to determine which cylinder was the issue. In these motors you can't get a proper compression reading. The readings jump all over the place.

mick56 · 12-24-2016, 12:10 PM

Quote:

Originally Posted by Rasta

I tried that on mine trying to determine which cylinder was the issue. In these motors you can't get a proper compression reading. The readings jump all over the place.

Thinking about it.Doesnt one of the cylinders have a decompressor on the valves,to allow for easier starting.Would that prevent a true reading with the engine not running ? I am sure i read in the manual,that the psi is different in the cylinders,is this the reason.

**cnc** · 12-24-2016, 12:18 PM

Quote:

Originally Posted by mick56

Thinking about it.Doesnt one of the cylinders have a decompressor on the valves,to allow for easier starting.Would that prevent a true reading with the engine not running ? I am sure i read in the manual,that the psi is different in the cylinders,is this the reason.

There are ways to do it but in my mind a leak down test would be more practical.

Lafer · 12-24-2016, 12:24 PM

According to the book the compression should be from 50 to 85 on this bike and I have around 75 of front cylinder and around 70 on rear... so either it's not a cylinder or compression test says nothing about piston slap.

I doubt that it's a lifter because there was no signs of wear when I bleed hydraulic adjusters but gonna check them out again when pull out the engine.

**MAS Tequila** · 12-24-2016, 12:32 PM

That's an HLA not pumping up.

Put 3 or 4 ounces of SeaFoam in the crankcase and let it run for 10-15 minutes.

If that doesn't change anything take it for a ride and bounce it off the rev limiter a few times.

Then change your oil.

Did you change the screens in the heads, or look to see if they were clogged?

Put a mechanic's stethoscope or piece of broom stick up to the head and listen.

You will be able to tell where it's coming from.

Sometimes a little Marvel's Mystery Oil helps too.

Good luck and keep us posted.

MT

mick56 · 12-24-2016, 12:40 PM

http://www.vulcanbagger.com/forums/s...ad.php?t=38403

Lafer · 12-26-2016, 05:23 PM

Tried seafoam today, run engine for about one hour, no changes...
Listen engine with mechanic stethoscope and noise is coming from the front cylinder top head, though maybe it lifters.

No, I didn't change screens in the heads, just cleaned them a little.

Removed engine today and in a couple days will try to find out what is coursing this noise.

12-23-2016, 01:18 PM	#19
DragonLady58 Sr. Member Join Date: Jul 2016 Location: Somewhere South of Alaska.... Posts: 2,351	Pizton slap, rod bearing, wrist pin.... __________________ --------------------- Don't start no schit, there won't be no schit.... My Sarcasm is directly proportional to the amount of Stupidity involved --------------------- VBA#03239 VROC#37400 VRA --------------------- 2014 Vaquero 2001 Nomad FI 2003 Street Glide (sold) 1500 Meanie, fresh rebuild (sold) 90s BUBF Bobber (sold) 2001 UltraCycle FatPounder (Sold) 1975 HD ElectraGlide (Sold) 1982 Kawasaki Z1 Chopper (Sold) Suck It Up & Ride!
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12-23-2016, 01:19 PM	#20
mick56 Sr. Member Join Date: Nov 2013 Location: The Newforest, England Posts: 4,664	I reckon if your piston is slack enough to make that much noise,a compression test would pick it up easily enough. __________________ when this you see, remember me, and bear me in your mind, let all the world say what they may, speak of me as you find. Login or Register to Remove Ads
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12-23-2016, 01:21 PM	#21
mick56 Sr. Member Join Date: Nov 2013 Location: The Newforest, England Posts: 4,664	CNC.Thanks for the video mate. __________________ when this you see, remember me, and bear me in your mind, let all the world say what they may, speak of me as you find.
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12-24-2016, 11:55 AM	#23
Rasta Join Date: Sep 2011 Location: Ankeny Iowa Posts: 3,697	I had this issue if some of you remember when my bike would not start. When it finally started I had told you there was a big bang. Well eventually it started this ticking that is in this video. If I let the bike seat idling the lifters would pump up and it would quiet down. After riding it hard for a while the noise would return. My final conclusion was that I a slash adjuster/ lifter that would bleed down. I planned to pull the motor and replace all the adjusters since it would be hard see which one it was. They are about $75 each, multiply that by 8. After talking to MAS TEQUILA I found a motor with about 20,000miles for a little over $1000. Since the original motor had 75,000miles on it, I got the other motor and put it in instead. __________________ VROC#34321 VBA#01867 2012 NCR Rally Savanna. IL. 2013 National Rally Estes Park, CO 2014 NC/SC Rally in the Ozarks, Mountain View AR 2014 NE US/Eastern Canada Rally,Lincoln NH 2015 VBA/VRA Eureka Springs AR 2015 Antlers Rally, Antlers OK. 2016 SCR Rally Salem MO. 2016 NCR Rally Hillsboro WI 2017 Eureka Springs AR 2017 National Rally Lake George NY 2004 Blue and Silver 1500 Nomad(RIP 9-26-19) 2000 Red and Silver 1500 Nomad 2012 Pearl White 1700 Voyager
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12-24-2016, 12:32 PM	#28
MAS Tequila Join Date: Jan 2009 Location: Psychiatric Ward FL Posts: 3,429	That's an HLA not pumping up. Put 3 or 4 ounces of SeaFoam in the crankcase and let it run for 10-15 minutes. If that doesn't change anything take it for a ride and bounce it off the rev limiter a few times. Then change your oil. Did you change the screens in the heads, or look to see if they were clogged? Put a mechanic's stethoscope or piece of broom stick up to the head and listen. You will be able to tell where it's coming from. Sometimes a little Marvel's Mystery Oil helps too. Good luck and keep us posted. MT __________________ MT 2016 FLHP Psychiatric Ward FL VBA 936 Last edited by MAS Tequila; 12-24-2016 at 02:11 PM.
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12-23-2016, 12:31 PM	#17
redjay Top Contributor Join Date: Feb 2008 Location: Ontario Posts: 6,935	Relay, Rejay ? Too many cookie crumbs in the keyboard :)
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12-23-2016, 01:04 PM	#18
Lafer Jr. Member Join Date: Dec 2016 Location: Mount Holly, North Carolina Posts: 24	Thank guys for replies, the bike is 2000 VN1500 FI. There are no other problems with it except of this noise. The work I done on it: removed engine, replaced all top gaskets dawn to cylinder head, replaced rocker cover because there was side crack in it. Replaced spring on KACR unit because it started to digging hole in rocker case (maybe it was be better to just get rid of KACR). Bleed air from hla, inspected camshaft and there was no obvious signs of wear... I know I should inspected piston while top end was removed, my bad didn't do it. Today tryed to block starter solenoids cause read somewhere that they could make noise similar with piston slap, so no changes happened but now it starts harder and the noise is still there. Exhaust is pretty tight, so probably it's not what causing my problems. Don't want remove engine again but if I dont find an easyer solution I'am gonna do it... Here the guy posted video with piston slap and I bet it's sounds like mine problem
	0

12-24-2016, 12:24 PM	#27
Lafer Jr. Member Join Date: Dec 2016 Location: Mount Holly, North Carolina Posts: 24	According to the book the compression should be from 50 to 85 on this bike and I have around 75 of front cylinder and around 70 on rear... so either it's not a cylinder or compression test says nothing about piston slap. I doubt that it's a lifter because there was no signs of wear when I bleed hydraulic adjusters but gonna check them out again when pull out the engine.
	0

12-24-2016, 12:40 PM	#29
mick56 Sr. Member Join Date: Nov 2013 Location: The Newforest, England Posts: 4,664	http://www.vulcanbagger.com/forums/s...ad.php?t=38403 __________________ when this you see, remember me, and bear me in your mind, let all the world say what they may, speak of me as you find.
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12-26-2016, 05:23 PM	#30
Lafer Jr. Member Join Date: Dec 2016 Location: Mount Holly, North Carolina Posts: 24	Tried seafoam today, run engine for about one hour, no changes... Listen engine with mechanic stethoscope and noise is coming from the front cylinder top head, though maybe it lifters. No, I didn't change screens in the heads, just cleaned them a little. Removed engine today and in a couple days will try to find out what is coursing this noise.
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